New Browser Features

298293 - Fast back and forward (bfcache). You can tweak this feature by changing browser.sessionhistory.max_viewers from 3 to another number.

179656 - Allow drag-and-drop reordering of tabs. You can also reorder tabs using the keyboard by focusing the tab bar and then pressing Ctrl+Left, Ctrl+Right, Ctrl+Home, or Ctrl+End.

Fixed (?): 296868 - Improved software update service with cross-session incremental downloads and new update-notification UI. (Disabled by default for alpha. Coming soon: binary patches rather than full downloads of new versions.)

DOM Inspector, Talkback, and Reporter (optional components in the Firefox installer) are now extensions.

293392 - Enable E4X (ECMAScript for XML) by default in chrome windows and in XUL scripts. (E4X is disabled by default for scripts in HTML because it conflicts with the <!-- --> hack for hiding script blocks from ancient browsers, but E4X can always be enabled with <script type="text/javascript; e4x=1">.)

283730 - [Windows] "Save As" dialog tries to overwrite link/shortcut (.lnk) file instead of opening the directory/folder. (This was fixed in a way that does not make Firefox users vulnerable to a security hole in Windows.)

76831 - [Windows] Slow to restore from minimized state (default config.trim_on_minimize to false).